Any cardboard tube is called a poppo. This comes from the two sounds you get. First the pop when you hit someone on the head then the oh from the one you hit. Poppos can be a lot of fun. Wrapping paper tube poppos are great swords.

When you eat dirt for the first time and leave your family to build a shack in the woods

Poppo is a indie-folk band from sweden that i discovered on myspace, they are so good ;>

its also the only good thing comming from malmo, sweden

potty wala, aka potty man, aka the most chutiya and harami bacha in this planet. fav song: hey! (...is your neck game sloppy)